Timeline for Why can't devices on different VLANs, but on the same subnet, communicate?
Current License: CC BY-SA 4.0
26 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 21, 2021 at 16:37 | history | protected | Ron Maupin♦ | ||
| Dec 21, 2021 at 15:57 | answer | added | Prashantp28 | timeline score: -3 | |
| Jan 3, 2021 at 1:35 | comment | added | Ron Maupin♦ | Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you can post and accept your own answer. | |
| Apr 13, 2019 at 18:30 | answer | added | telcoM | timeline score: 0 | |
| Apr 12, 2019 at 17:21 | comment | added | Matt Douhan | @Cown how would different VRFs help? They would not communicate anyway then, and to answer your question simply bridge the vlans, as simple as that. Bridging has been available in Cisco routers since long before I took my CCIE and that was over 20 years ago | |
| Apr 12, 2019 at 17:17 | comment | added | JFL | @Cown it is not possible on a Cisco router to have addresses from the same subnet on different interfaces, but this has little to do with the VLAN themselves which don't care about IP addresses (and could be use with, say, IPX/SPX). And... Cisco is sill an important actor but far from the only one. | |
| Apr 12, 2019 at 15:12 | comment | added | user36472 | @MattDouhan Unless the Vlans are in different VRF's or some other separator, then no, that is not possible, at least not on Cisco. Please prove it. | |
| Apr 12, 2019 at 15:00 | answer | added | Lightness Races in Orbit | timeline score: 1 | |
| Apr 12, 2019 at 10:15 | comment | added | Matt Douhan | @Cown you can most definitely have the same IP on multiple VLANS although it may not be beneficial to do so | |
| Apr 11, 2019 at 21:10 | answer | added | jonathanjo | timeline score: 9 | |
| Apr 11, 2019 at 19:50 | answer | added | Zac67♦ | timeline score: 6 | |
| Apr 11, 2019 at 16:19 | comment | added | WakeDemons3 | This question is somewhat of a tautology. They can't because they can't, by design. The creation of separate VLANs logically segments the switched internetwork. You now need to use some form of inter-VLAN routing for these devices to communicate. | |
| Apr 11, 2019 at 16:15 | answer | added | Ricky | timeline score: 0 | |
| Apr 11, 2019 at 15:00 | history | tweeted | twitter.com/StackNetworkEng/status/1116355403716222976 | ||
| Apr 11, 2019 at 13:58 | answer | added | Eddie | timeline score: 44 | |
| S Apr 11, 2019 at 13:42 | history | suggested | Peter Mortensen | CC BY-SA 4.0 |
Copy edited.
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| Apr 11, 2019 at 13:24 | review | Suggested edits | |||
| S Apr 11, 2019 at 13:42 | |||||
| Apr 11, 2019 at 12:54 | history | edited | user36472 | CC BY-SA 4.0 |
edited title
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| Apr 11, 2019 at 12:04 | history | became hot network question | |||
| Apr 11, 2019 at 11:48 | history | edited | jonathanjo | CC BY-SA 4.0 |
copy eidt
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| Apr 11, 2019 at 11:44 | comment | added | jonathanjo | Hello Jim Pap and welcome ... It's like you plugged your two hosts into two different switches, one labelled "LAN 10" and the other labelled "LAN 20". Configuring VLANs on your switch divides your switch into multiple, virtual, switches. | |
| Apr 11, 2019 at 11:41 | answer | added | infra | timeline score: 1 | |
| Apr 11, 2019 at 11:38 | answer | added | JFL | timeline score: 30 | |
| Apr 11, 2019 at 11:34 | comment | added | user36472 | You need a router to route between different Vlans. Also, when doing that, you cannot have the same IP subnet on those two Vlans. | |
| Apr 11, 2019 at 11:20 | review | First posts | |||
| Apr 11, 2019 at 13:24 | |||||
| Apr 11, 2019 at 11:16 | history | asked | Jim Pap | CC BY-SA 4.0 |